/
vumeter_vis.pixi
119 lines (97 loc) · 2.44 KB
/
vumeter_vis.pixi
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xsize = get_xsize( get_screen() )
ysize = get_ysize( get_screen() )
hxsize = xsize / 2
hysize = ysize / 2
fn audio_callback(
$stream,
$userdata,
$channels,
$frames,
$output_time_in_system_ticks,
$in_channels,
$latency_in_frames )
{
if wav_ptr >= wav_size { ret( 0 ) }
$c = 0
while( $c < wav_channels )
{
copy( $channels[ $c ], wav, 0, wav_ptr + $c, $frames, 1, 2 )
$c + 1
}
copy (buf,wav,0,wav_ptr,xsize,1,1)
wav_ptr + $frames * wav_channels
ret( 1 )
}
begin: // hello
fname = file_dialog("Open","wav","lol","sound.wav")
if fname == -1 { go end }
buf = new ( xsize, 1, FLOAT32 )
clean (buf)
wav = load( fname )
wav_ptr = 0
wav_size = get_size( wav )
wav_channels = get_prop( wav, "channels" )
set_audio_callback( audio_callback, 0, get_prop( wav, "sample_rate" ), get_type( wav ), wav_channels )
fn math_max ($a,$b) {
if ($a > $b) { ret( $a )}
if ($b > $a) { ret( $b )}
if ($a == $b) { ret( $a)}
}
fn math_min ($a,$b) {
if ($a > $b) { ret( $b )}
if ($b > $a) { ret( $a )}
if ($a == $b) { ret( $a)}
}
fputs( "WAV file loaded.\n" )
start_timer(0)
mCurrentAngle = 0
while( 1 )
{
t = get_timer(0)
pivotRadius = 3.5
animationInterval = 50
pivotYOffset = hysize
shadowOffset=5
dropoffStep = 0.1
surgeStep = 0.35
minAngle = M_PI / 8
maxAngle = M_PI*7/8
angle = minAngle
if (((t / animationInterval) - (t div animationInterval)) == 0) {
cur = abs(buf[1])
angle + ((maxAngle - minAngle)*cur/32768)
if(mCurrentAngle < angle) {
mCurrentAngle = angle
}
if(mCurrentAngle > angle) {
mCurrentAngle = math_max(angle, mCurrentAngle-dropoffStep)
}
if(mCurrentAngle == angle) {
mCurrentAngle = math_max(angle, mCurrentAngle-dropoffStep)
}
mCurrentAngle = math_min(maxAngle, mCurrentAngle)
pivotX = 0
pivotY = ysize - pivotRadius - pivotYOffset
l = (ysize*4)/5
sine = sin(mCurrentAngle)
cose = cos(mCurrentAngle)
xo = pivotX - l*cose
yo = pivotY - l*sine
transp(250)
clear()
transp(255)
line(xo+shadowOffset,yo+shadowOffset,pivotX+shadowOffset, pivotY + shadowOffset, get_color(50,50,50))
line(xo,yo,pivotX,pivotY,WHITE)
frame()
}
while( get_event() )
{
key = EVT[ EVT_KEY ]
if key == KEY_RIGHT || key == '[' { wav_ptr + 10000 }
if key == KEY_LEFT || key == ']' { wav_ptr - 10000 }
if EVT[ EVT_TYPE ] == EVT_QUIT { halt }
}
if wav_ptr >= wav_size { go begin }
}
end:
fputs( "Program finished.\n" )